Agent session molecules (gt-gastown-crew-joe, gt-gastown-witness, etc.)
update frequently for status tracking, creating noisy entries in the
activity feed. This change:
- Adds IsAgentSessionBead() to identify agent session beads
- Filters out "update" events for agent sessions from the event feed
- Still updates the agent tree so status is visible there
- Still shows create/complete/fail/delete events for agents
The filtering happens in addEvent() in the TUI feed model. Agent session
updates are identified by parsing the bead ID pattern and checking for
known agent roles (mayor, deacon, witness, refinery, crew, polecat).
Resolves: gt-sb6m4
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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